Final answer:
ECG findings that suggest a non-cardiac arrest cause include atrial fibrillation, ventricular tachycardia, heart blocks, and ST segment changes, although more comprehensive diagnoses often necessitate comparisons with previous records or additional testing.
Step-by-step explanation:
Electrocardiogram (ECG) findings that point towards a non-cardiac arrest cause can include indications of conditions such as atrial fibrillation, ventricular tachycardia, or various degrees of heart block. For instance, atrial fibrillation is characterized by an abnormal electrical pattern prior to the QRS complex and an increased frequency between QRS complexes.
Ventricular tachycardia presents with an abnormal shape of the QRS complex, and various heart blocks demonstrate a lack of coordination between atrial activity (the P wave) and ventricular activity (the QRS complex). Conditions like an enlarged P wave may suggest atrial enlargement, while flatter T waves can indicate myocardial hypoxia. An elevation of the ST segment above baseline often signifies an acute myocardial infarction (MI), and depression of the segment can point to hypoxia. More detailed and comprehensive diagnoses require comparisons with previous ECG records or further testing like echocardiography.